

#app{
    display: grid;
    grid-template-rows: 100px 1fr;
    height: 100vh;
}

.grid250-1fr{

    display: grid;
    grid-template-columns: 250px 1fr;
}

ul {
    margin: 0;
    margin-bottom: 10px;
}

li{

    margin-top: 5px;
}

header
{
    background-color: cornflowerblue;
    color: white;
    height: 100%;
}

aside{
    padding: 20px;
    border-right: 2px solid cornflowerblue;
}

main{
    padding: 20px;
}

#frm_customer  input[type="text"]{

        padding: 8px 3px;
        outline: none;
        border: 2px solid lightseagreen;
        min-width: 300px;

}

#frm_customer {

    font-size: 12px;
}

#frm_customer div {
    margin-bottom: 5px;
}
